Hoist bracket



Nov. 21., 1950 w. A. DUFFEY 2,530,452

HOIST BRACKET Filed Jan. 4, 1949 2 Sheets-Sheet 1 IN VEN TOR.

W/'///'c7/77 'Duffey :m== ATTORNEYS W. A. DUFF EY HOIST BRACKET Nov. 21,1950 2 Sheets-Sheet 2 Filed Jan. 4, 1949' y INVENTOR. l//'///'am 4-Duffey w wwreo.

ATTD RN EYS Patented Nov. 21, 1950 UNITED STATES PATENT OFFICE HOISTBRACKET William A. Dufiey, Paterson, N. J. Application January 4, 1949,Serial No. 69,133

1 Claim. 1

The present invention relates to ladder attachments, and in particularto a hoisting apparatus adapted to be conveniently applied to a ladderof conventional design.

One object of the invention is to provide a hoisting attachment forladders which can be easily applied and removed without necessitatingthe use of various clamping devices and the like.

Hence, is formed of rigidly connected parts and requires no adjustmentswhen being applied to the holder.

Another object is to provide a hoisting attachment for conventionalladders in which the hoisting cable can be manipulated from a positionadjacent the foot portion of the ladder to enable the operator to standclear of the load without exerting an outward pulling force on the footportion of the ladder.

Another object is to provide a hoising attachment for ladders having asupporting bracket arranged such as to distribute the hoist load over arelatively great length of the ladder between spaced apart ladderrounds.

Another object is to provide a hoisting attachment for ladders ofconventional design having a removable boom arm swiveled to the bracketin such a manner as to afford operation thereof from either side of theladder.

Another object is to provide a hoisting attachment for ladders in whichthe boom arm and a bracket are so constructed as to form a couple toexert opposite and non-concurrent forces on the ladder in a direction toforce the lower end of the ladder toward the object against which it ispropped, while the other end is held immovable against said object.

Another object is to provide a hoisting attachment for ladders andscaffolds which can be easily fabricated without the use of expensivewelding fixtures and which can be quickly and conveniently assembled onthe ladder or other support when its use is desired.

Another object is to provide a hoisting attachment for ladders which issuspended or hung from the underside of the ladder with the hoist orboom arm projecting through a pair of adjacent ladder rounds so as notto interfere with the normal use of th ladder throughout the majorportion of its length. The boom or hoist arm is arranged to extendoutwardl from the front of the ladder and can be conveniently swiveledto one side or the other out of the way during the normal of the ladder.

Other objects and advantages of the invention will become apparentduring the course of the following description of the accompanyingdrawings wherein:

Figure 1 is a side elevational view of the hoisting attachment showingthe manner in which the hoist bracket is applied to the rounds of aconventional ladder with the boom or hoist arm projecting throughadjacent ladder rounds.

Figure 2 is a perspective view of the hoisting attachment showing thebracket removed and illustrating various structural details of thebracket and the manner in which the boom or hoist arm is swiveledthereon. 7

Figure 3 is a horizontal cross-sectional view taken on line 33 of Figure2, looking in the direction of the arrows and showing the manner inwhich the sections of the bracket are pivotally connected to facilitatefolding, and also showing the position of the socket for receiving thelower end of the boom or hoist arm, and

Figur i is a horizontal cross-sectional View taken on line 4-4 of Figure2, looking in the direction of the arrows, and showing the swivelsupport or collar for the boom or hoist arm and the manner in which itis affixed to the side frame members.

In the drawings, and more in detail, there is shown for the purpose ofconvenience of illustration a'conventional ladder generally designated 5(Fig. 1) to which is attached the hoisting device embodying theinvention generally indicated 6. The ladder 5 includes a pair of stiles7 connected by vertically spaced ladder rounds 8. The upper end of thestiles l are also connected by a plate 9 which is adapted to be affixedto the cave strip of a roof R or other covering for the building B. Ifdesired, the plate 9 can be held in place by wire, screws or otherfastening means (not shown).

The hoisting attachment 6 includes a bracket structure formed of a pairof spaced parallel angle bars l0, one of the flanges of each beingextended and angularly bent to provide a ladder round engaging jawmember H. Welded to the same flange of each angle bar it is an anglebracket l2 which is spaced from the angular-1y bent portion l I and isadapted to cooperate there with to form parallel ladder round engagingportions. The angle bars I!) are held in spaced apart relation by meansof transverse plates it and it which have their ends welded to one ofthe flanges of each angle bar to form a frame structure of generallyrectangular shape.

Pivotally attached to the end of each of the angle bars 10 is asupporting bar l6 which is held in place by suitable fastening elementssuch as the bolts and nuts I! and I8 respectively. The supporting bars[6 are connected adjacent their upper ends by means of a transverse barl9 and the free ends of the supporting bars iii are twisted as at 20 andterminate in ladder round engaging hooks 2|.

The boom or hoist arm 22 is formed of round metal stock (either hollowor solid) and is of L-shaped construction to provide a vertical standardportion 23. standard portion 23 is received in a tubular socket 24welded to the cross plate I5 as at 25. The intermediate portion of thestandard 23 is supported by a collar 26 which is welded to a curvedintermediate portion 2'! of the cross bar 19, (Figure 4). It is to benoted, that the collar 26 is offset vertically a slight distance fromthe socket 24, and that said socket 24 and collar 26 are positioned atan angle to the cross plate l5. Thus, the standard portion 23 of theboom or hoist arm 22 extends rearwardly when the hoisting attachment isin position as shown in Figure 1.

The free end of the hoisting boom or arm is provided with an opening forreceiving an eye ment of various objects to one end of the cable, 1

while a pulling force is exerted on the opposite end of the cable orrope 38. It will be-noted that the workman can stand adjacent the footof the ladder and in front thereof while exerting a pulling force on therope or cable 38, and that when such a force is applied with the ladder5 at an angle shown in Figure 1, the frame structure of the hoistingattachment 6 exerts opposite and non-concurrent forces on the ladderrounds upon which it is supported in the same sense as a couple. Hence,a downward force applied by the rope or cable to hoist various weightsand loads will exert an inward force on the lower foot portion of theladder in the direction of the building B, while the upper end is heldrigid by the anchor plate 9. Thus, the moment of the force applied willcause the lower end of the ladder to be wedged into tight groundengagement and will stabilize the ladder.

It will readily be observed, that the hoisting The lower end of theattachment can be selectively positioned on the ladder 5 by placing theround engaging jaws lll2 and hooks 2| over certain spaced apart ladderrounds 8. When the hoisting attachment is in position as shown in Figurel, the hoisting boom or arm standard 23 extends at a slight angle to thebracket structure and passes between adjacent ladder rounds so that thearm 22 can be swung from its forward position (Fig. 1) to either side ofthe ladder.

When the hoisting attachment is not in use it is removed from the ladder5 and then can be conveniently folded by removing the boom arm standard23 from the socket 24 and collar 26, and swinging the supporting arms I6on their pivot points I! to a position parallel with the angle irons orbars 10.

It is further to be understood, that the form of the invention herewithshown and described is to be taken as a preferred embodiment of the sameand that various changes in the shape, size and arrangement of parts canbe resorted to without departing from the spirit of the invention or thescope of the subjoined claim.

I claim:

In a hoisting attachment for ladders, a bracket structure havingvertically spaced apart sets of ladder round engaging jaws forsupporting said bracket beneath an inclined ladder, an upwardlyextending tubular socket on said bracket structure, a collar secured tosaid bracket structure above and in spaced axial alinement with saidsocket, a vertical standard with its lower end received in said socketand passing upwardly through said collar, a boom arm on said standardextending laterally therefrom to project between adjacent ladder rounds,and a tackle block suspended from the outer end of said boom arm havinga cable sheave and cable for lifting various objects toward the upperend of said ladder.

WILLIAM A. DUFFEY.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 309,435 Bodell Dec. 16, 1884606,763 Lukens July 5, 1898 1,333,699 Behrens c Mar. 16, 1920 2,131,133Babson Sept. 27, 1938 2,153,803 Jerabek Apr. 11, 1939 2,203,113 UeckerJune 4, 1940

